Re: RDFSync 0.1

Hi Giovannni,
(I am posting this to the list only so that all can see/reply.)
1. I have noticed dbin. There seems to be increasing convergence in this
area towards various sorts of CMS solutions.
But your work seems particularly interesting in that tentative equivalences
can be made. Would this be right:-
Using OWL to express rules, rule set A and rule set B are determined to have
elements E expressed differently but with the same meaning.
It is also determined that E in B (using all of B) is more particular and
non contradictory to E in A (using all of A), so E in B can be used to
augment E in A?
The point being the mediation done between E in A and E in B to determine
they are functionally the same.
2. Interesting that you think many companies would want this. It seems there
are many barriers. But I think it would be interesting to try to improve on
the XML marshalling that is done by AXIS and is a common starting point for
many projects where XSD is used to define the data. This is the situation
with much gov work. Of course first point is that there are imporvements to
AXIS, in particular JiBX data binding which uses binding definition files.
More research to be done.
But re XML2OWL_XSLT hmafra is similar but in code rather than script. I am
imagining the whole thing can be made more effective as I outlined in my
original post.
Adam

On 23/03/06, Giovanni Tummarello <g.tummarello@gmail.com> wrote:
>
> Hi there, i am not sure about many of the things here, but i'll try
>
> 1) i dont know if it could be related. If agents want to efficently
> exchange what they know then yes :-) have you seen http://www.dbin.org ?
> 2) i can only suggest things like
> http://www.semanticscripting.org/XML2OWL_XSLT . There are other works
> around however you might want to keep looking. It seems to me it will be
> a vey major work to do .. a lots of businesses are going to want this
> transiction. Good i guess :-)
> Sorry i cant be of more help..
> Giovanni
>
> adasal wrote:
> > Hi Giovanni,
> > This seems like a very interesting technological development.
> > It has wide applicability.
> > I would like to ask a couple of questions.
> > 1. Demonstrators of ubiquitous computing such as COBRA from UMBC
> > http://ebiquity.umbc.edu/project/html/id/1/
> > <http://ebiquity.umbc.edu/project/html/id/1/>
> > use their architecture which includes agents that encapsulate OWL rule
> > sets to mediate those rules. How does this tecfhnology touch on that
> > sort of usage?
> > 2. Quite separately I am also interested in re-postioning XML -- > RDF
> > (OWL), actually more acurately XSD -> RDFS/OWLS. There are some tools
> > and a general theory (OWLmt, hmafra, Model Management - graph theory).
> > How does this touch on that topic, because it seems to me that it
> > does. Isn't XMl -> RDF (more general, less well defined) -> (more
> > specific, less ambiguous) where there is possible information loss in
> > the resolution of the ambiguity and where different RHS (RDF)
> > expressions may be derived from the LHS (XML)?
> > Wouldn't versioning and version tracking have a role to play in this
> > since alternatives are different versions that maybe proposed as the
> > "same" but without loss of underlying data, as I understand what you
> > are working on. I am sure this can be pushed further in terms of
> > automating the process of XML -> RDF?
> > Any thoughts?
> > Best,
> > Adam
> >
> >
> > On 22/03/06, *Giovanni Tummarello* < g.tummarello@gmail.com
> > <mailto:g.tummarello@gmail.com>> wrote:
> >
> >
> >     The problem is really general.. but there have been many mentioning
> >     applications for one such procedure. Not last look at the early
> >     postings
> >     by TBL and others referenced in the paper.
> >
> >     Anyway, scenario include but are not limited to scalable cluster
> >     of RDF
> >     DBs (powering similarly scalable web sites, semantic web services)
> >     especially in loose heterogeneous, P2P or grid environments; mobile
> >     devices syncing.
> >     One for all, we will use it right away in DBin version 0.4 coming
> >     soon (
> >     http://dbin.org ): RDFSync is used each time one client meets
> >     another in
> >     P2P group earlier, the entire graph surrounding a URI had to be
> passed
> >     at each p2p direct exchange. Not good as the data increased in the
> >     group.
> >     Giovanni.
> >
> >     Hans Teijgeler wrote:
> >     > Hi Giovanni,
> >     >
> >     > Interesting, but what requirement is fulfilled by this?
> >     >
> >     > Regards,
> >     > Hans
> >     >
> >     > -----Original Message-----
> >     > From: semantic-web-request@w3.org
> >     <mailto:semantic-web-request@w3.org>
> >     [mailto:semantic-web-request@w3.org
> >     <mailto:semantic-web-request@w3.org>] On
> >     > Behalf Of Giovanni Tummarello
> >     > Sent: Tuesday, March 21, 2006 23:53
> >     > To: semantic-web@w3.org <mailto:semantic-web@w3.org>
> >     > Subject: RDFSync 0.1
> >     >
> >     >
> >     > RDFSync 0.1
> >     > -----
> >     >
> >     > Introduction
> >     >
> >     > Remote RDF model synchronization is a procedure by which one
> >     efficiently
> >     > updates a local model based on a remote one. By updating one can
> >     mean "make
> >     > identical to the remote" (classic RSync) but in this case it
> >     might mean
> >     > "patch" with information from a remote model not present in the
> >     current one.
> >     >
> >     > Classic procedures such as RSync cannot be applied to RDF models
> >     since they
> >     > usually serialize nondeterministically. Even if a deterministic
> >     > serialization algorithm such as is used (Such as J. Carrol's
> >     canonical
> >     > serialization of RDF Graphs) , the performance of classic RSync
> >     remain poor,
> >     > as minimal modifications in the model might cause completely
> >     different
> >     > canonical serializations.
> >     >
> >     > RDFSync is an efficient RDF Synchronization algorithm based on
> >     the canonical
> >     > serialization of a Minimum Self Contained graph decomposition of
> >     remote RDF
> >     > models. For further details, experimental results and demo code
> >     please
> >     > visit:
> >     >
> >     > http://semedia.deit.univpm.it/tiki-index.php?page=RdfSync
> >     >
> >     > as highlighted in the short paper, some issues do remain.
> >     Looking forward
> >     > for direct feedbacks from those interested.
> >     >
> >     > Giovanni Tummarello
> >     > also on behalf of Christian Morbidoni and others at Semedia -
> >     > http://semedia.deit.univpm.it
> >     >
> >     > --
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